The Diamondbacks are probably making most of their final depth signing before Spring Training, by adding another reliever who had previous success in the majors but has fallen hard lately. There is nothing wrong with trying to add competition to the bullpen with three open spots in the bullpen. Brad Ziegler, Daniel Hudson, Andrew Chafin, and Silvino Bracho are basically locks for the bullpen and one of those spots is likely going to a LOOGY. Competition is often a very good thing because when you have a lot of qualified candidates, it brings out the best in all of them.